Lubin, or Leobinus, was a 6th century bishop of Chartres. He was born into a rural family near Poitiers and worked as a shepherd,
learning to read and write from local monks. Through diligence and devotion he overcame his poor origins, took religious orders and
eventually worked his way up to to the episcopacy. As Bishop of Chartres he was credited with many of the reforms and developments that
formed the basis of the Cathedral's later success and was therefore one of the most important local saints in the Chartrain litany, with
two feasts (one a duplex) in his name. The fact that he had been a cellarer (the man within the monastic community or cathedral chapter
responsible for
all its provisions, including the wine cellar) gave him a particular association with wine production. A church in his honour was built
nearby the Chapter's vineyards - the starting point of a much celebrated annual procession which brought the new season's wine in to the
Chapter's magnificent stone-vaulted storehouse (the Loewens), just to the north of the cathedral close.

Quite a lot has been written about this window, with some authors perhaps falling deeper than usually into the trap of over-interpretation.
Nevertheless it remains a highly distinctive and sometimes enigmatic visual narrative which merits research.